Automatic multiple-spindle lathe.



c. M. omnsew. AUTOMATIC MULTIPLE SPENDLE LATHE.

APPLICATION EFILED MAR. 30, NH4. l @@gg I mam my is, im

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m4 la az v ` C. IVI. CONBADSON. -Amon/mic MULTIPLE SPINDLE LATHE,

APPLICATION FILED I'IAR. 30| |914;

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APPLICATION FILED MAR. 30, 19M.

Patente@ Maly 189 19m,

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AUTGMATIC MULTIPLE SPINDLE LATHE.

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Patenvted May 18, 1915.

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C. M. CONRADSON. AUTOMATIC MULTIPLE SPTNDLE LATHE. APPUCATIN FILED MAR. 30,1914. 119114:@20

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C. IVI. CONRADSON. AUTOMATIC MULTIPLE SPINDLE'LATHE.

I APPLICATION FILED MMI- 30,1914. j u 1I 5,1%@92990 Patente@ May 18, 1915.

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w @Maw/@RLY F C. IVI. CONRADSON.

AUTOMATIC MULTIPLE SPINDLE LATHE.

APPLICATION rlLEn :I1/m30. 1914.

C.. NI. CONRADSON.

AUTOMATIC MULTIPLE SPINDLE LATHE.

APPLICATION FILED ma; 30. 1914.

Patente May 18, 1915.

I1 SHEETS-SHEET 9.

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C. M. CONRADSON. AUTOMATIC MULTIPLE SPTNDLE LA-THE.

C. IVI. CONRADSON. AUTOMATIC MULTIPLE SPINDLE LATHE.

APPLICATION FILED PIIAR. 30l |914.v L 1%@990 Patented, may 18,1915.

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AUTOMATIC MULTIPLE SPINDLE LATHIEJ APPLICATION FILED'MAR. 3o. 1914.

a/z Waff/Pf 119 l' C. M. CONRADSON.- AUTOMATIC MULTIPLE SPINDLE LATHE.

APPLICATION FILED MAR. 30| 1914. I

'Patente May 18 I? SHEETS-SHEET I 3.

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C. IVI. CONRADSON.

AUYTONIATIC MULTIPLE SPINDLE LATHE.

APPLICATION FILED MAR. 30, 1914. LMQQQQ Patented May 18, 1915.,

II SHEETS-SHEET I4.

C. N1. CONRADSON. AUTOMATIC MULTIPLE SPINDLE LATHE.

C. v. CONRADSON. AUTGMATiC MULTIPLE SPINDLE LATHE.

MPLICATWN FILED MAR. 30| 1914.

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AUTOMATIC MULTIPLE SPINDLE LATHE.

APPLICATION msn mma. so, 19m.

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CONRAD M. CONRADSON, 0F MADISON, WISCONSIN.

aufroivia'rio MULTIPLE-semana' Leann.

Specication of Letters Patent.

Patented May 1S, 119515.

Application 'lled March 30, lm. Serial N o. 828,369.

To all lwhom t may concern Be it known that I, CONRAD M. CONRAD- soN, citizen of the United States, resident of Madison, county of Dane, State o f Wisconsin, have invented certain newl and useful Improvements in Automatic Multiple- Spindle Lathes, of which the following is a specification.

-The object of my invention is to provide a lathe having a large working capacity, and` which, when once adjusted for a certain piece of work and set in motion, will require no attention on the part of the operator eX- cept to change the Work or the tools.

A further object is to provide an automatic lathe that is capable of doing eX- tremely fine, accurate Work and capable of handling or working upon a comparatively small or large article.

A further object is to provide an automatic lathe of strong, durable construction, having all its parts readily accessible for adjustment or repairs, capable of operation'at a variety of speeds, and considering the character and the amount of thework performed, of comparatively simple construction.

The invention consists generally in various constructions and combinations, all las hereinafter described and particularly pointed out in the claims. Y

'In the accompanying drawings forming part of this specification, Figure 1 is a front elevation ofian automatic multiple spindle lathe embodying my invention, Fig. '2 is a vertical sectional view through the base and lower portion of lthe lathe, taken on the line r-r of Fig. 3, Fig. 3 is a horizontal sectional view on the line mof Fig. 2, Fig..

4, is a vertical sectional View. throughl the base of the lathe, the work carrier and thev tool carriage, taken on the line 'sd-Hs of Fig. 6, Fig. 5 is a vertical sectional view .through the cross head supporting the toolcarriers, the upper portion of the ,ideof the l.cross Vhead andthe inelastic Hui "cylinderalid iston therefor at the'top'of the. machine y 1g. 6 isa horizontal sectional View on the line 1h-y of Fig. 5Figy7 is ahorizpntal sectional view on the line .e9-0f Eigpg.

is a'sectional 'view on t 'e line` Fig. 7, Fig. 9 1s a lsectlona v1ew,r..showing the means for imparting an intermittenthmoyement-'to the work carrier, Fig.' 10 is an enlarged.- detail View ofthe left: hand endof.

Figa-9, Fig.' `11T-is a-sectional View onthe line 'v--v of Fig. 9, Fig. 12 is a sectional view, showing the means for operating the ywork carrier lock bolt, Fig. 13 is a detail sectional view, showing the mechanism for shifting the gears to change the speed of the chucks, Fig. 14 is a sectional view on the line m--m of Fig. 13, Fig. 15 is a detail- 'sectional View, showing the means for adjusting and feeding thetool carrier at the side of the machine, Fig. 15a is a detail sectional view, showing the means for adjust# "cross-head nearly at the limit of its stroke,

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Fig. 20 is a diagrammatic View, showing the position of the parts when the cross-head has reached the limit of its downward movement and is on the point of beginning its return stroke, Fig.`21 is a detail' view of the trippingmechanism and the actuatin `de'- vice threfor, Fig. 22 is al detail View, s o'wing the device which is actuated when the cross-head' reaches the limit of its downstroke to automatically operate a trip mechanism and reverse the movement of, the cross-head, Fig. 28 is a detail View of a por;- tion of the tripping mechanism, illustrated at the top of Fig. 21, Fig. 24: is a plan 4view of Fig. 21, showing the position of the valvebox on thel machine andthe actuating cams for the valves,-Fig. 25 is a sectional. view throu' h one ofthe valve-boxes, Fig. 26iis an en argedview of the valve-box and ,the actuating cams, Fig. 27Y is a sectional view on -the line C-C of Fig. 28, Fig. 2 8 is a sectional view on theline A--A of Fig. 27, Fig.

29 is a sectional view on the line B-,B of

v'Fig-F27,Fig.- 30' isa sectional Viewv on the lineD-Dof Fig. 26, Fig. 31 isa sectional' vieta-"ion the line E -E of Fig. 26Fig. 32

is a sectional'view on the ,line F--F of Fig. l

33 lis a sectional. view Bon the line iii-#GQ of 26, Figrli 1s a sectonal'view 'loathe-'line' G-i-U of Fig. 35, of the trip fknechanism, showing it in its normal locking ilo position, Fig. 35 is a `sectional view on the f 4o shaft. A ring 26 is splined onand encircles the collar 21 and has a clutch connection at line H-'H of Fig.- 34, Fig. 36 is a detail sectional view of the trip mechanism in its released osition, Fig. 37 is a front view of the hy raulic pump for operating'the tool carrier cross-head, Fig. 38 is a sectional view through the pump .on the line P--P of Fig. 3

The driving mec umz'sm--In the drawings, Figs. 1, 2 and 3, 2 represents a pulley mounted on -a shaft 3 to be driven from a. suitable source of power, not shown. The

shaft 3 has bearings in a bracket 4 that is vsecured to the base 5 of the machine. A gear -6 is mounted on one end of the shaft 3 and a pinion 7 on the oppositev end, meshing respectively with gears 8 and 9.

Referring to Fig. 7, the gears 8 and 9 are Secured o nthe hubs of clutch members 1,0'

and 11, which have bearings on the opposite ends of a hollow shaft 12, adjacent toI ,other clutch members 13 and 14 which are secured on said vhollow shaft. The clutch members 10 and 11 have a longitudinal movelnent on their bearings and are normally held out of frictional engagement with the clutch members 13 'and 14 by springs 15 fitting Ashaft 1 within sockets in the members 10 and 11 and engaging ins 16 carried b said members. is preferably tted within the shaft 12 and has a limited longitudinal movement therein, regulated by lock nuts 18 on the ends of the shaft.y The shaft 17 is held against rotary movement in the hollow shaft. A pin.19l passes through the shaft 17 and has its ends mounted to slide in slots 20'in the hollow shaft 12. A collar 21 is preferably secured -on the hollow shaft and is provided with a alever 22 centrally pivotedat 23 therein and having a lug 24 ,which` projects into a recess 25 in the hollow 27 with an arm 28 that is pivoted at 29 and 1s connected t0 the rod 30 of apiston 31 of Apiston 31 in the other direction will reverse an inelastic Huid cylinder 32 having bear# ings on thebracket 4 above and adjacent to said shafts. The cylinder 32 has Pipe connections-33 and 34 with a source o inelastic fluid supply, such as oil, under suitable pressure, and with the controlling valve-boxr forming a circulating s stem, as will hereinafter appear. It is s cient to state at this vpoint that the movement of the piston 31' 1n one direction will vcause the lever 2 to be. rocked and force the shaft 17 a s uicient distance .to release one of the clutches and lock the other, while the movement of the the directionof movement of the shaft 17 .and reverse the position'of the clutches.

l. A bevel gear 35 is securedI on the hollow shaft 12 (see Figs. 2, 3A and 7) and meshes -1 with a similar gear 36 on a horizontal shaft 37 having bearings in the base l5.and provided at its inner end'with a -pinion 38. By

means of vthe mechanism` heretofore described the shaft 37 may beoperated at a variablevspeed. The chuck and operating spindles therefo1'.-The pinion 38 meshes with a gear 39 `that is mounted on the lower end of a vertical shaft 40 loosely mounted in the lower end of an upright, centrally-arranged column 41. shaft 40 gears 42 and 43 are mounted, lone above another, the latter gear being larger than the former one. Grouped around the (See Figs. 2 and 4). Upon the shaft 40, equi-distant therefrom and from one another, are a series of vertically arranged spindles 44. I have shown six of these spindles having suitable bearings at their upper and lower ends, but do not conline myself to-this number, as the construel tion is susceptible of modification ,in this respect and still be within the scope of-my invention. Upon the lower portions of these spindles, opposite the gears 42 and 43, gears 45 and 46 are splined and adapted to slide vertically.' A collar 47 is loosely mounted on each spindle beneath the gears 45 and 46 and forked arms 48 are mounted on shafts 49 which preferably extend horizontally through the base of the machine and have operating cranks 50 thereon and pins 51 for entering sockets 52 provided in the wall of said base. (See Figs. 1, 2 yand 3). There are as many of these shafts asv there are spindles, three being provided on the fro-nt of the base and three at the rear thereof, and each shaft is capable of three adjust ments, as indicated in l, one socket or depression indicating the adjustmentl for one gear and speed, another socket for another gear and speed, and the intermediate socket for the neutral position, or when both gears 45 and 46 are -out of mesh with the gears 42 and 43 andthe spindle is station ary.l With the mechanismso far described, the operator is able to revolve the shaft 37 at different speeds and impart a variable speed to the shaft 40, and may also operate the uprightspindles at two different speeds, and may operate all of them at the same time or any number of them, as desired. These driving'or chuck-operating spindles, it will be understood from the foregoing,

have a revolution on their axes independently of one another, but do not revolve with carrier there are mounted as series of chuck.

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manges spindles 57, preferably hollow, to allow the metal shavings to drop down through them from the chucks 58 mountedy on the upper ends of the spindles.V There are, in this machine, six spindles and six chucks, corresponding in number to the spindles 44 and arranged opposite and adjacent thereto. Each chuck spindle is preferably provided with gears 59 and 60 secured thereon and adapted to mesh with pinions 61 and 62 splined on the adjacent spindle 44. These gears and pinions vary in size to enable the operator to adjust them for revolving the chucks and spindles at different speeds. Each chuck and its spindle is preferably operable independently of all the otherv chucks and their spindles and consequently one or more of them may be operated at one speed while the others are operated at another speed, at the same time. The pinions.

61 and 62 may be raised or lowered by any suitable means, but I prefer to provide a sleeve 68 on each spindle 44, having at its upper end a pin and groove connection at 64 with the hub on which the pinions are mounted, and provided in its outer surface with a series of rack teeth 65 which are engaged by a pinion 66 on a short shaft 67 that is suitably mounted in a socket 68 adjacent to said Asleeve andprovided with av squared end 69 for an operating tool. A

- stop 70 normally engages the teeth of the to be stationary.

pinion 66 and locks it against revolution and supports the pinions 61 and 62 in their adjusted position, and a spring 71 normally holds the shaft 67 and the pinion in position to engage said stop. Endwise pressure on said'shaft will force it inwardly t disengage the pinion from the stop and allow the shaft to be revolved to,-l raise or lower the sleeve andadjust the pinions in engagement with their gears respectively or move them to a neutral position between -the gears when the operator desires the chuck (See Figs. 4, 13 and 14.) The wall of the work carrier 53 is provided with openings 72, (see Figs. 1 and 4) through which the operator may haveaccess to the shaft 67. These adjustments, when once madefor a certain class of work, will The chuck spindles, as indicated in Fig.

4, are preferably provided with tapered sleeve bearings 73 and 74 for convenience of adjustment to take up wear. rlhe lower portion of the work carrier is rovided with an annular gearring 75, ee Figs. 1, 2 and 4.) j

For the convenience 'of the operator, the operating or drivingspindle at the front of thefmachine is allowed to remain stationary, and as the chuck spindles pass from driving engagement with one driving spindleito another, it follows that each chuck spindle, when in the station or period at the front of lthe machine, will be stationary on its axis,

`thereon, and a second' ratchet member 79 is loosely mounted on said shaft below the member 78 and has a toothed face 8O to engage the teeth of a rack ba'r 81 that is mounted to slide in a differential cylinder 82. (See Figs. 9, 10, and 11.) rlhe cylinder 82 is provided with a comparatively large inelastic fluid chamber 83 and a smaller vinelastic fluid chamber 84, the latter connecting through a pipe 85 with the source of in- 90 elastic Huid supply, (not shown) and the former communicating through a pipe 86 with the controlling valve-box, as will be more fully described hereinafter. vA piston 87 is mounted on the bar 81 within the cham- 95 ber 83 and a smaller piston 88 is mounted on the opposite end of the bar 81 within the chamber 84. When the valve is open in the valve-boi: to allow the inelastic fluid to flow into the chamber 83,-the piston 8.7 will be forced toward .the position indicated in Fig. 9, the teeth of the rack bar engaging lthe teeth of the clutch member 79 will, through its engagement with the teeth of the clutch member 78, revolve the shaft 76 105 and through the pinion 77 and the gear ring 75, revolve the work carrier. The clutch member 78 will remain yby gravity in engagement with the teeth of the clutch member 79 as long as the clutch member 79 is llt operated in one direction, but on the back stroke of the rack bar the teeth of the lower -clutc'h member will slip past the teeth of the upper clutch member, allowing the shaft 76 v to remain stationary while the rack bar re- 1'15 turns to its normal position to begin another stroke.A rl`he work carriertherefore revolves with a step by step or intermittent, movement, there being a series of such movements during the complete revolution of the work carrier, 'with a comparatively short stationary or rest period between the move-4 ments. The operating mechanism for the carrier is so proportioned and the move-. mentsare so timed that there will be six completemovements or strokes of the carrier with each revolution, corresponding in number to the chucks and spindles. rl`hus if Athe operator places a piecej olf work in the 

